JP2006137029A - Panel structural material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel structural material excellent in rigidity and more excellent in productivity as compared with a conventional honeycomb structure or a structure constituted by superposing at least two panels having a large number of protruded parts one upon another. <P>SOLUTION: The panel structural material 100 is composed of one backing panel 300 wherein a large number of unit cell parts formed of the protruded parts and the planar parts around the skirts of them are arranged regularly and a smooth surface panel 200 joined to the protruded parts or both sides of the backing panel, and the unit cell parts are formed so that the ratio of the plane view projection area D of the protruded parts to the plan view projection area A of the unit cell parts satisfies the formula of 0.3≤D/A≤0.8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a panel structure material suitably used as a structural material on a floor surface or a wall surface of a structure such as a building, a vehicle, and an aircraft.

  As a conventional panel structure material, a so-called honeycomb structure is widely used. This honeycomb-structured panel has a structure in which a flat plate is joined to both sides of a hexagonal honeycomb core in which a large number of cells are formed of an extremely thin metal material, and has excellent characteristics such as light weight and high rigidity. is doing. However, this honeycomb-structured panel (honeycomb panel), for example, is produced by laminating a large number of corrugated aluminum ribbons and forming a honeycomb shape by brazing or bonding with an adhesive. However, there was a problem that the manufacturing cost was high. Moreover, sound is easily transmitted through the densely arranged honeycomb core, and there is a problem in terms of soundproofing performance.

  Therefore, in order to solve the productivity problem, as shown in FIG. 9, as a panel structure material, one thin-walled metal structure material (backing plate) 52 formed with a large number of convex portions 52a and both surfaces thereof. There has been proposed a metal panel 50 made of a thin metal surface material 51 bonded to the surface (Japanese Patent Application Laid-Open No. 6-316015). The processing of the structural member 52 of the metal panel 50 is significantly more than a honeycomb core such that a large number of convex portions 52a are integrally formed on a thin metal material such as aluminum by a method such as drawing or pressing. The number of points can be reduced, and high productivity can be realized. In addition, when the joining of the structural material 52 and the surface material 51 is spot-welded by spot welding or the like, the contact point between the surface plate 51 and the structural material 52 is significantly reduced as compared with the honeycomb structure panel, thereby reducing the soundproof performance. It is considered that can be significantly increased.

  However, the metal panel 50 has a problem that it lacks rigidity, as described below. FIG. 10 is a view showing a deformed state when a load is applied to the conventional metal panel, and FIG. 10A shows a deformed state when a distributed load P is applied while the entire lower surface of the panel is supported. (B) is a figure which shows the deformation | transformation state at the time of applying the distributed load P in the state in which only the edge part of the panel lower surface was supported.

  As shown in FIG. 10A, when the distributed load P is applied with the panel lower surface being stable, the metal panel 50 exhibits excellent strength. However, as shown in FIG. 10B, in the state where only the peripheral end portion of the lower surface of the panel is supported, the planar portion 52b between the convex portions 52a is easily shear-deformed by the distributed load P. As a result, the rigidity is low.

  Therefore, in order to increase the rigidity, as shown in FIG. 11, two panels 62 having a large number of convex portions 62 a are laminated to form a panel laminate 63, and a surface material 61 is provided on the upper and lower surfaces of the panel laminate 63. A panel structure material (high rigidity panel) 60 formed by bonding has been proposed (Japanese Patent Laid-Open No. 9-141769). In this case, the projections 62a of the two panels 62 are joined to each other by spot welding, and each surface material 61 is attached to the upper and lower surfaces by screws.

However, the panel structure material 60 is not practical because it increases the material cost and is extremely time-consuming to manufacture, and is greatly inferior to the honeycomb structure in terms of cost.
Japanese Patent Laid-Open No. 6-316015 (page 2, FIG. 1) Japanese Patent Laid-Open No. 9-141769 (page 2-4, FIG. 1)

  Accordingly, an object of the present invention is to provide a panel structure material that has excellent rigidity and productivity compared to a conventional honeycomb structure or a structure in which two or more panel plates having a plurality of convex portions are stacked. It is to provide.

  In order to solve the above problems, the present invention takes the following technical means.

  According to the first aspect of the present invention, there is provided a single backing plate in which a large number of unit cell portions formed from a convex portion and a flat portion around the base thereof are regularly arranged, and the convex portion side or both surfaces of the backing plate. And a ratio of the planar projection area D of the convex portion to the planar projection area A of the unit cell portion is in a range of 0.3 ≦ D / A ≦ 0.8. The panel cell structure material is characterized in that the unit cell portion is formed so as to satisfy.

  The panel structure material according to claim 1 includes a single backing plate in which a large number of unit cell portions formed from convex portions and flat portions around the base thereof are regularly arranged, and the convex portion side of the backing plate. Or a smooth surface plate bonded on both sides, and the ratio of the planar projection area D of the convex portion to the planar projection area A of the unit cell portion is 0.3 ≦ D / A ≦ 0. The unit cell portion is formed to satisfy the range of 8. Thus, by appropriately setting the area of the plane part of the unit cell part, the occurrence of the deflection of the panel structure material due to the large shear deformation that occurs when the area of the plane part is larger than the appropriate range, and the area of the plane part It is possible to avoid both the occurrence of deflection of the panel structure material due to a large bending deformation that occurs when it is smaller than the appropriate range. Therefore, it can have high rigidity, and it has a simple structure and superior productivity compared to the conventional honeycomb structure and the structure in which two or more panel plates with a large number of projections are stacked. can do.

  FIG. 1 is a view showing a panel structure material according to an embodiment of the present invention, in which (a) is a perspective view showing an overall configuration of the panel structure material after a part of the panel structure material is cut away, and (b). Is a perspective view showing a backing plate of the panel structure material, and (c) is a plan view showing a unit cell portion of the backing plate.

  As shown in FIG. 1, the panel structure material 100 of this embodiment is formed of a surface plate 200 made of an aluminum alloy, a hollow convex portion 311, and a flat portion 312 around its skirt in this example of a flat thin wall. In this example of a thin wall having a periodic structure in which a large number of unit cell portions 310 are regularly arranged, an aluminum alloy backing plate 300 is provided, and the surface plate 200 and the backing plate 300 are provided with a convex portion 311 of the backing plate 300. It is joined by spot welding at the flat top of each.

  In the backing plate 300, a large number of unit cell portions 310 formed by hollow convex portions 311 and a flat portion 312 around the base thereof are regularly arranged, and as shown in FIG. The portion 311 has a hollow quadrangular pyramid shape in this example, and the flat surface portion 312 has a square outer contour extending outward from a substantially square base edge of the convex portion 311 in this example. Yes.

  Then, as shown in FIG. 1C, the unit cell unit 310 has a planar projection area D () of the projection 311 with respect to the planar projection area A (square in the case of FIG. 1C) of the unit cell unit 310. The ratio of (substantially square in the case of FIG. 1C) is formed so as to satisfy the relationship of 0.3 ≦ D / A ≦ 0.8.

  FIG. 2 is a diagram for explaining the operation of the panel structure material of the present invention, and (a) is a diagram for explaining the deflection of the panel structure material when D / A <0.3. b) is a diagram for explaining the deflection of the panel structure material when 0.3 ≦ D / A ≦ 0.8, and (c) shows the deflection of the panel structure material when 0.8 <D / A. It is a figure for demonstrating.

  In FIG. 2, 10 is a surface plate, 20 is a backing plate in which a large number of unit cell parts composed of hollow convex portions 21 and flat portions 22 are regularly arranged, and the entire peripheral edge of the backing plate 20 is supported. In the state, an evenly distributed load P is applied to the entire area of the surface plate 10. The front plate 10 and the backing plate 20 are joined at the top of the convex portion 21 of the backing plate 20.

  As shown in FIG. 2A, when the area of the plane portion 22 is large (D / A <0.3), in the panel structure material, since the shearing force between the adjacent convex portions 21 is difficult to be transmitted, Shear deformation is likely to occur and the deflection increases. On the other hand, as shown in FIG. 2C, when the area of the plane portion 22 is very small (0.8 <D / A), the shear force between the convex portions 21 is easily transmitted, so that the shear deformation itself is small, The overall bending stiffness is reduced, the bending deformation is increased, and as a result, the overall deflection is also increased. On the other hand, by setting the unit cell portion to satisfy 0.3 ≦ D / A ≦ 0.8, the deflection of the panel structure material due to the large shear deformation that occurs when the area of the plane portion 22 is larger than the appropriate range. Both the occurrence and the occurrence of the bending of the panel structure material due to the large bending deformation that occurs when the area of the plane portion 22 is smaller than the appropriate range can be avoided, and high rigidity can be obtained (FIG. 2B). ). In the panel structure material of the present invention, the deflection is relatively insensitive to the shape of the convex part of the unit cell part and the shape of the flat part, and is very sensitive to the D / A ratio. Accordingly, the shape of the unit cell portion can be selected widely.

  FIG. 3 is a perspective view showing an example of the shape of the unit cell portion of the backing plate according to the present invention.

  As described above, in the panel structure material of the present invention, the shape of the unit cell portion can be selected relatively widely within a range that satisfies the definition of 0.3 ≦ D / A ≦ 0.8. The unit cell part 320 shown in FIG. 3A is formed of a convex part 321 having a hollow frustum shape, and a flat part 322 having a square outer contour extending outward from the circular skirt periphery of the convex part 321. ing. The unit cell portion 330 shown in FIG. 3B includes a convex portion 331 having a hollow multiple quadrangular pyramid trapezoidal shape, and a flat portion 332 having a square outer contour extending outward from the square base edge of the convex portion 331. Is formed. A unit cell portion 340 shown in FIG. 3C includes a convex portion 341 having a hollow multiple frustoconical shape, and a planar portion 342 having a regular hexagonal outer contour extending outward from the circular skirt periphery of the convex portion 341. And is formed from.

  4 is a perspective view showing the backing plate of the panel structure material used in the embodiment of the present invention, FIG. 5 is a cutaway perspective view showing an enlarged main part of the panel structure material of FIG. 4, and FIG. FIG. 7 is a cutaway perspective view showing an enlarged main part of the panel structure material of FIG. 6 in an enlarged manner.

  Analysis of the degree of deflection when a load was applied was performed on two types of panel structural materials having different unit cell shapes. No. 4 and 5, the panel structure member 1 includes a surface plate 500, a convex portion 611 having a hollow frustum shape, and a flat portion 612 having a square outer contour. 610 is provided with a backing plate 600 regularly arranged in a large number, and the surface plate 500 and the backing plate 600 are joined (spot welded) at the flat top of the convex portion 611 of the backing plate 600. No. 6 and 7, the panel structure material 2 of FIG. 2 is a unit cell formed of a surface plate 800, a convex portion 911 having a hollow quadrangular pyramid shape, and a plane portion 912 having a square outer contour. The surface plate 800 and the backing plate 800 are joined (spot welded) at the flat top portion of the convex portion 911 of the backing plate 990.

  No. 1, No. 1 In the panel structural members 400 and 700 of FIG. 2, the side length L of the surface plates 500 and 800 and the backing plates 600 and 900 is 1000 mm, and the side length p of the unit cell portions 611 and 911 is 111 mm (= 1000 mm / 9). The distance h between the plate thickness center of the surface plates 500 and 800 and the plate thickness center of the flat portions 612 and 912 is 19.25 mm, the plate thickness of the aluminum alloy surface plates 500 and 700 is 3.5 mm, aluminum The thickness of the alloy backing plates 600 and 900 is 1.4 mm.

  As a load, an equally distributed load was applied to the entire surface plate 500,800. Further, as boundary conditions, the entire peripheral ends of the backing plates 600 and 900 were fixed in the vertical direction, and the rotation was free. The parameters for changing the D / A of the unit cell units 610 and 910 are as shown in Table 1, and In the panel structure material 400 of No. 1, the cone angle θ (see FIG. 5) of the hollow frustoconical convex portion 611 is adopted. In the panel structure material 700 of FIG. 2, the base length d (see FIG. 7) of the convex portion 911 having a hollow quadrangular pyramid shape is employed. As for the value of “deflection”, the minimum value (when the D / A value is 0.478 for the panel structure material of No. 1) is 1.0, and the relative value is displayed in a dimensionless manner. The analysis results are shown in Table 1 and FIG.

  As can be seen from Table 1 and FIG. 1, No. 1 In the panel structure materials 400 and 700 of No. 2, if the D / A value of the unit cell portions 610 and 910 satisfies the range of 0.3 ≦ D / A ≦ 0.8 defined by the present invention, the deflection is 1. It became 35 or less (refer FIG. 8), and it has confirmed that high rigidity was acquired. When it is out of the range of 0.3 ≦ D / A ≦ 0.8, the deflection increases rapidly. In addition, there is no significant difference in deflection between the one having the hollow frustoconical convex portion 611 and the one having the hollow quadrangular pyramidal convex portion 911 depending on the shape of the convex portion. It can also be seen that the value of is dominant. This analysis result is valid regardless of the Young's modulus of the material of the front plate and the backing plate, so the same result will be obtained regardless of whether the material of the front plate and the backing plate is aluminum alloy, steel, resin, etc. is there.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the panel structure material by one Embodiment of this invention, Comprising: The (a) is a perspective view which shows the whole structure of the panel structure material after cut | disconnecting a part of panel structure material, The (b) is a panel structure. The perspective view which shows the backing plate of material, The (c) is a top view which shows the unit cell part of a backing plate. It is a figure for demonstrating the effect | action of the panel structure material of this invention, Comprising: The (a) is a figure for demonstrating the deflection | deviation of the panel structure material in the case of D / A <0.3, The (b) is The figure for demonstrating the deflection | deviation of the panel structure material in the case of 0.3 <= D / A <= 0.8, The (c) is for demonstrating the deflection | deviation of the panel structure material in the case of 0.8 <D / A. FIG. It is a perspective view which shows the example of a shape of the unit cell part of the backing plate which concerns on this invention. It is a perspective view which shows the backing plate of the panel structure material used in the Example of this invention. It is a notch perspective view which expands and shows the principal part of the panel structure material of FIG. It is a perspective view which shows the backing plate of another panel structure material used in the Example of this invention. It is a notch perspective view which expands and shows the principal part of the panel structure material of FIG. It is a graph which shows the deflection | deviation analysis result in an Example. It is a notch perspective view which shows the conventional metal panel. It is a figure which shows the deformation | transformation state at the time of applying a load to the conventional metal panel, Comprising: (a) is a figure which shows the deformation | transformation state at the time of applying the distributed load P in the state where the whole panel lower surface was supported. (B) is a figure which shows the deformation | transformation state at the time of applying the distributed load P in the state in which only the edge part of the panel lower surface was supported. It is a partially cutaway perspective view showing a conventional panel structure material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Panel structural material 200 ... Surface board 300 ... Backing board 310,320,330,340 ... Unit cell part 311,321,331,341 ... Convex part 312,322,332,342 ... Plane part 400 ... No. 1 panel structure material 500... Surface plate 600 .. backing plate 610... Unit cell portion 611. 2 panel structure material 800 ... surface plate 900 ... backing plate 910 ... unit cell part 911 ... convex part 912 ... plane part

Claims (1)

  One backing plate in which a large number of unit cell portions formed from a convex portion and a flat portion around the base thereof are regularly arranged, and a smooth surface joined to the convex portion side or both surfaces of the backing plate The unit cell so that a ratio of a planar projection area D of the convex portion to a planar projection area A of the unit cell portion satisfies a range of 0.3 ≦ D / A ≦ 0.8. A panel structure material in which a portion is formed.

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